BLOB : BLOB (Binary Large Object) is a large object data type in the database system. BLOB could store a large chunk of data, document types and even media files like audio or video files. BLOB fields allocate space only whenever the content in the field is utilized. BLOB allocates spaces in Giga Bytes. USAGE OF BLOB : You can write a … Read more
You are using a transaction; autocommit does not disable transactions, it just makes them automatically commit at the end of the statement. What is happening is, some other thread is holding a record lock on some record (you’re updating every record in the table!) for too long, and your thread is being timed out. You … Read more
Try replacing the string literal for date ‘1989-12-09’ with TO_DATE(‘1989-12-09′,’YYYY-MM-DD’)
There is no combination of LIKE & IN in SQL, much less in TSQL (SQL Server) or PLSQL (Oracle). Part of the reason for that is because Full Text Search (FTS) is the recommended alternative. Both Oracle and SQL Server FTS implementations support the CONTAINS keyword, but the syntax is still slightly different: Oracle: SQL … Read more
You can obtain this information and much, much more by querying the Information Schema views. This sample query: Can be made over all these DB objects: CHECK_CONSTRAINTS COLUMN_DOMAIN_USAGE COLUMN_PRIVILEGES COLUMNS CONSTRAINT_COLUMN_USAGE CONSTRAINT_TABLE_USAGE DOMAIN_CONSTRAINTS DOMAINS KEY_COLUMN_USAGE PARAMETERS REFERENTIAL_CONSTRAINTS ROUTINES ROUTINE_COLUMNS SCHEMATA TABLE_CONSTRAINTS TABLE_PRIVILEGES TABLES VIEW_COLUMN_USAGE VIEW_TABLE_USAGE VIEWS
You need to tell MySQL which database to use: before you create a table. In case the database does not exist, you need to create it as: followed by:
It occurred because you tried to create a foreign key from tblDomare.PersNR to tblBana.BanNR but/and the values in tblDomare.PersNR didn’t match with any of the values in tblBana.BanNR. You cannot create a relation which violates referential integrity.
I would use this: This will group by the first of every month, so will give ‘20130101’. I generally prefer this method as it keeps dates as dates. Alternatively you could use something like this: It really depends what your desired output is. (Closing Year is not necessary in your example, but if the date range … Read more
Whenever this happens to me, I press Ctrl+Shift+R which refreshes intellisense, close the query window (save if necessary), then start a new session which usually works quite well.
Use INSERT IGNORE INTO table. There’s also INSERT … ON DUPLICATE KEY UPDATE syntax, and you can find explanations in 13.2.6.2 INSERT … ON DUPLICATE KEY UPDATE Statement. Post from bogdan.org.ua according to Google’s webcache: 18th October 2007 To start: as of the latest MySQL, syntax presented in the title is not possible. But there are several very easy ways to accomplish … Read more